The 100 Zombie "Challenge" v3!

Lower the zombies health by clicking on him. He has 100 health. Kill him to win! He will slowly creep to you as well. Dont let him get you! Edit: In v2 when he reaches 50 health he will throw deadly fireballs at you! Press space to dodge them. Edit 2: In Hard Mode the zombie is slightly faster and fireballs are thrown more frequently. Can you beat it? I did. You can do it!!!! <3 Edit 3: The boss in Story Mode has the same mechanics! Its still space to duck- but you actually jump.